Note 10 - Income Taxes (Details Textual) - USD ($)	Sep. 30, 2023	Jun. 30, 2023
Liability for Uncertainty in Income Taxes, Current	$ 530,000
Unrecognized Tax Benefits	530,000
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards	0
Tax Credit Carryforward, Amount	0
Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Operating Loss Carryforwards	108,000
Tax Credit Carryforward, Amount	0
Deferred Tax Assets, Valuation Allowance	$ 29,000	$ 24,000